Zobrazeno 1 - 10
of 874
pro vyhledávání: '"M. Sayer"'
Publikováno v:
Communications Earth & Environment, Vol 5, Iss 1, Pp 1-8 (2024)
Abstract We report on observed trend anomalies in climate-relevant global ocean biogeochemical properties, as derived from satellite ocean color measurements, that show a substantial decline in phytoplankton carbon concentrations following eruptions
Externí odkaz:
https://doaj.org/article/6807394e006543d49665fcc4180877f8
Autor:
M. Gao, B. A. Franz, P.-W. Zhai, K. Knobelspiesse, A. M. Sayer, X. Xu, J. V. Martins, B. Cairns, P. Castellanos, G. Fu, N. Hannadige, O. Hasekamp, Y. Hu, A. Ibrahim, F. Patt, A. Puthukkudy, P. J. Werdell
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 5863-5881 (2023)
The University of Maryland, Baltimore County (UMBC) Hyper-Angular Rainbow Polarimeter (HARP2) will be on board NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission, scheduled for launch in January 2024. In this study we systematically eval
Externí odkaz:
https://doaj.org/article/710aa8e6142943318261814f70fa7757
Autor:
E. Gryspeerdt, A. C. Povey, R. G. Grainger, O. Hasekamp, N. C. Hsu, J. P. Mulcahy, A. M. Sayer, A. Sorooshian
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 4115-4122 (2023)
Atmospheric aerosols and their impact on cloud properties remain the largest uncertainty in the human forcing of the climate system. By increasing the concentration of cloud droplets (Nd), aerosols reduce droplet size and increase the reflectivity of
Externí odkaz:
https://doaj.org/article/6afbc7d57ae14e55ac522f316c617e2d
Autor:
A. M. Sayer, L. Lelli, B. Cairns, B. van Diedenhoven, A. Ibrahim, K. D. Knobelspiesse, S. Korkin, P. J. Werdell
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 969-996 (2023)
This paper provides the theoretical basis and simulated retrievals for the Cloud Height Retrieval from O2 Molecular Absorption (CHROMA) algorithm. Simulations are performed for the Ocean Color Instrument (OCI), which is the primary payload on the for
Externí odkaz:
https://doaj.org/article/9f721d196aed465f9f3bb73a53ee906e
Autor:
M. Gao, K. Knobelspiesse, B. A. Franz, P.-W. Zhai, A. M. Sayer, A. Ibrahim, B. Cairns, O. Hasekamp, Y. Hu, V. Martins, P. J. Werdell, X. Xu
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 4859-4879 (2022)
Multi-angle polarimetric (MAP) measurements can enable detailed characterization of aerosol microphysical and optical properties and improve atmospheric correction in ocean color remote sensing. Advanced retrieval algorithms have been developed to ob
Externí odkaz:
https://doaj.org/article/1c2baa95435d4c39b5e08dc5c391dfc6
Autor:
C. Chen, O. Dubovik, D. Fuertes, P. Litvinov, T. Lapyonok, A. Lopatin, F. Ducos, Y. Derimian, M. Herman, D. Tanré, L. A. Remer, A. Lyapustin, A. M. Sayer, R. C. Levy, N. C. Hsu, J. Descloitres, L. Li, B. Torres, Y. Karol, M. Herrera, M. Herreras, M. Aspetsberger, M. Wanzenboeck, L. Bindreiter, D. Marth, A. Hangler, C. Federspiel
Publikováno v:
Earth System Science Data, Vol 12, Pp 3573-3620 (2020)
Proven by multiple theoretical and practical studies, multi-angular spectral polarimetry is ideal for comprehensive retrieval of properties of aerosols. Furthermore, a large number of advanced space polarimeters have been launched recently or planned
Externí odkaz:
https://doaj.org/article/9962d97c061144ca88a8df7597dff913
Autor:
M. Mallet, F. Solmon, P. Nabat, N. Elguindi, F. Waquet, D. Bouniol, A. M. Sayer, K. Meyer, R. Roehrig, M. Michou, P. Zuidema, C. Flamant, J. Redemann, P. Formenti
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 13191-13216 (2020)
Simulations are performed for the period 2000–2015 by two different regional climate models, ALADIN and RegCM, to quantify the direct and semi-direct radiative effects of biomass-burning aerosols (BBAs) in the southeast Atlantic (SEA) region. Diffe
Externí odkaz:
https://doaj.org/article/22fc1cd951564ea195b906d408071c8d
Autor:
N. Schutgens, A. M. Sayer, A. Heckel, C. Hsu, H. Jethva, G. de Leeuw, P. J. T. Leonard, R. C. Levy, A. Lipponen, A. Lyapustin, P. North, T. Popp, C. Poulsen, V. Sawyer, L. Sogacheva, G. Thomas, O. Torres, Y. Wang, S. Kinne, M. Schulz, P. Stier
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 12431-12457 (2020)
To better understand and characterize current uncertainties in the important observational constraint of climate models of aerosol optical depth (AOD), we evaluate and intercompare 14 satellite products, representing nine different retrieval algorith
Externí odkaz:
https://doaj.org/article/0f8703ab6974454fb61b77f0d18f3d28
Autor:
A. M. Sayer, Y. Govaerts, P. Kolmonen, A. Lipponen, M. Luffarelli, T. Mielonen, F. Patadia, T. Popp, A. C. Povey, K. Stebel, M. L. Witek
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 373-404 (2020)
Recent years have seen the increasing inclusion of per-retrieval prognostic (predictive) uncertainty estimates within satellite aerosol optical depth (AOD) data sets, providing users with quantitative tools to assist in the optimal use of these data.
Externí odkaz:
https://doaj.org/article/edc7aede989f45dbbf02f8780d7bd9ce
Autor:
L. Sogacheva, T. Popp, A. M. Sayer, O. Dubovik, M. J. Garay, A. Heckel, N. C. Hsu, H. Jethva, R. A. Kahn, P. Kolmonen, M. Kosmale, G. de Leeuw, R. C. Levy, P. Litvinov, A. Lyapustin, P. North, O. Torres, A. Arola
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 2031-2056 (2020)
Satellite instruments provide a vantage point for studying aerosol loading consistently over different regions of the world. However, the typical lifetime of a single satellite platform is on the order of 5–15 years; thus, for climate studies, the
Externí odkaz:
https://doaj.org/article/24c92b47ea1c40479280d391ec6d3e9d